Coastal Flood Risk Analysis Using Landsat-7 ETM+ Imagery and SRTM DEM: A Case Study of Izmir, Turkey
Coastal Flood Risk Analysis Using Landsat-7 ETM+ Imagery and SRTM DEM: A Case Study of Izmir, Turkey
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DOI：
10.1007/s10661-006-9476-2
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发表时间：
2007-06
影响因子：
3
通讯作者：
A. C. Demirkesen;F. Evrendilek;S. Berberoglu;Ş. Kılıç
中科院分区：
文献类型：
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作者：
A. C. Demirkesen;F. Evrendilek;S. Berberoglu;Ş. Kılıç
政府间气候变化专门委员会(IPCC)报告称，由于全球气候变化，20世纪全球平均海平面(MSLR)上升速度加快。如果这种加速保持不变，那么一些沿海地区最有可能在2100年之前被淹没。有能力查明海岸线对全球气候变化造成的未来洪水灾害的不同脆弱性，这对于及时采取行动是必要的。Yildiz等人。(《测绘杂志》，17，1-75,2003)报告说，伊兹密尔市当地的MSLR在1984年至2002年期间以每年6.8 ± 0.9亿mm−的速度上升。利用Landsat-7增强专题影像(ETM+)最大似然分类得到的土地利用/土地覆盖(LULC)类型和航天飞机雷达地形任务(SRTM)获取的数字高程模型(DEM)分类，确定了伊兹密尔地区海岸淹没灾害的空间分布。据发现，平均海平面以上2米和5米的沿海地区容易被洪水淹没，分别占研究区域面积的2.1%和3.7%(6107千平方公里)。我们的研究结果显示，格迪兹河沿岸的门曼平原以及Karsiyaka、Alacati、Aliaga、Candarli和Selcuk定居点处于高风险之中，其顺序是在2100年之前减少永久和间歇性洪水的脆弱性，在20至35亿mm年−1的高MSLR情景下。
The Intergovernmental Panel on Climate Change (IPCC) reports an acceleration of the global mean sea-level rise (MSLR) in the twentieth century in response to global climate change. If this acceleration remains constant, then some coastal areas are most likely to be inundated by the year 2100. The ability to identify the differential vulnerability of coastlines to future inundation hazards as result of global climate change is necessary for timely actions to be taken. Yildiz et al. (Journal of Mapping, 17, 1–75, 2003) reported that the local MSLR in the city of Izmir rose at a rate of 6.8 ± 0.9 mm year−1between 1984 and 2002. In this study, the spatial distribution of the coastal inundation hazards of Izmir region was determined using not only land-use and land-cover (LULC) types derived from the maximum likelihood classification of Landsat-7 Enhanced Thematic Mapper Plus (ETM+) multi-spectral image set but also the classification of the digital elevation model (DEM) acquired by the shuttle radar topography mission (SRTM). Coastal areas with elevations of 2 and 5 m above mean sea-level vulnerable to inundation were found to cover 2.1 and 3.7% of the study region (6,107 km2), respectively. Our findings revealed that Menemen plain along Gediz river, and the settlements of Karsiyaka, Alacati, Aliaga, Candarli and Selcuk are at high risk in order of decreasing vulnerability to permanent and episodic inundation by 2100 under the high MSLR scenarios of 20 to 50 mm year−1.